The bacterial gut microbiome of probiotic-treated very-preterm infants: changes from admission to dischargeOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
This study characterised the gut microbiome of probiotic-treated premature infants from hospital admission to discharge. Researchers used 16S rRNA short amplicon sequencing of stool. They aimed to identify how bacterial gut flora changed over the stay and how it related to clinical variables. Meconium and faecal samples were analysed with a combination of univariate and multivariate methods, including mixed-effects modelling.
Who was studied?
The cohort was very-preterm infants born under 32 weeks gestation and under 1500 grams who received probiotic treatment. They were recruited in North Queensland, Australia. Meconium and faecal samples were collected at admission and at discharge. Analysis drew on 71 admission samples and 63 discharge samples. All infants were human neonates in a neonatal care setting.
What were the most important findings?
Univariate analyses showed significant changes in gut flora from admission to discharge. Mixed-effects modelling found significantly lower alpha diversity in infants diagnosed with sepsis or retinopathy of prematurity, and in those fed formula. Chorioamnionitis, preeclampsia, sepsis, necrotising enterocolitis, and retinopathy of prematurity were each associated with differential abundance of several taxa. The authors note a novel association between the preterm gut microbiome and preeclampsia, and describe this as the largest such study addressing retinopathy of prematurity.
What are the greatest implications of this study?
The findings reinforce a role for the gut microbiome in preterm infant health and disease. Lower diversity in infants with postnatal conditions or formula feeding supports promoting healthy microbiome development in these neonates. Links between microbiome shifts and maternal conditions like preeclampsia and chorioamnionitis suggest maternal and infant disease may both shape early colonisation. The observational design shows associations, not causation, and all infants received probiotics, which limits comparison to untreated infants.